1-D and 2-D model atmospheres: iron and lithium LTE abundances in the Sun.

Details 1-D and 2-D model atmospheres: iron and lithium LTE abundances in the Sun. 1-D and 2-D model atmospheres: iron and lithium LTE abundances in the Sun.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...324..281g&link_type=abstract

Astronomy and Astrophysics, v.324, p.281-288

Astronomy and Astrophysics

Astrophysics

14

Sun: Abundances, Sun: Photosphere, Line: Formation

Scientific paper

We discuss LTE abundance determinations of iron and lithium in the solar atmosphere using a grid of one-dimensional (1-D) and two-dimensional (2-D) model atmospheres. These models differ mainly in the convection treatment. We found that the influence of atmospheric inhomogeneities on the iron abundance comprises ~0.1dex for weak Fe I lines with low excitation potentials, and does not exceed ~0.05dex for weak Fe II lines. 2-D models show lower iron abundances for Fe I lines. On the other hand, lithium abundances obtained for 1-D homogeneous and 2-D inhomogeneous model atmospheres differ up to 0.1-0.2dex. 2-D model atmospheres result in lower lithium abundances, in contradiction with the recent suggestion of Kurucz (1995, Prepr. of Harvard-Smith. Cent. of Astrophys., no. 4054, 1).

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